After about 15 minutes of searching I have to conclude there isn't much Harry Potter-themed metal. Most of the stuff I found has already been posted so I'll just give you the link to a song titled "TITS!... or Azkaban!" by the grind band Wizards of Gore.

In all seriousness though, how on earth could anyone expect a HP-themed band to possess any musical value? Should we give Smurfs- or Pokemon-metal an openminded try next? For all I care, groups relying on Tolkien have been cringy enough. Somehow tragically on top of that sits when their music actually clearly does not depend on such lame backgrounds (see many second wave black metal bands).

In all seriousness though, how on earth could anyone expect a HP-themed band to possess any musical value? Should we give Smurfs- or Pokemon-metal an openminded try next? For all I care, groups relying on Tolkien have been cringy enough. Somehow tragically on top of that sits when their music actually clearly does not depend on such lame backgrounds (see many second wave black metal bands).

Given the amount of bands that make good music and whose lyrics suck big time, don't really see a problem.

Granted HP is not my thing and usually i wouldn't care for such lyrics, but I also don't reject music right away just because of the lyrical inclination of the band, even the most boring subjects can be approached with quality, depends on how good the writer is.